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GB 31604.62-2025 English PDF GB 45673-2025 3-2025_Chinese: Types and dimensions ofGB 31604. 62 2025_Chinese: National food safety standard Food contact materials and products Determination of migration and release of N nitrosamines (Chinese: N ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 31604. 62 2025